Interstate, CIVIL and extrastate wars, by nation year, when multiple wars then only consider largest (by deaths)
dropped Germany (ccode = 255) for lack of data, added missing cases for Czechoslovakia to match to cyear2 data
wbgdp gives federal republic data for Germany. unclear if Czech data refers to Czechoslovakia or only the Czech part.
Exceptions to averaging deaths over conflict years include Rwanda and Nagorno Karabagh.
group(gol_legbor gol_legsntv gol_legela gol_leglim gol_legqmaj gol_legmaj gol_legplu)
group(gol_stv gol_msl gol_sl gol_dhondt gol_mhare gol_riq gol_imp gol_droop gol_hare)
For c variable, pre-1973 values are set 1973 value if missing
All interaction terms are from centered component variables